SCCA Auto-X Rules: Read This First, Then Ask Questions

[livelyjay]

In stock class only from the cat-back. And yes it can be a huge weight savings, but make sure you are within any sound restrictions within your region.

According to the rule, it sounded like you could only remove the muffler itself, meaning you'd have to cut the pipe right before the muffler. Am I wrong? Does the rule mean you can just remove the cat-back as long as you remain under the noise allowance?

I also just realized my wheels don't qualify for stock class because the offset is 42 while stock is 55. Now I'm going to have to bust my butt finding wheels with a 49 or 50 offset. Thankfully no one really cares locally and there's no way I am running national.

 

[livelyjay]

Another question. The front sway bar may be modified in stock class, but what about the sway bar end links? One of my end links was bent when my car got side swiped. I replaced them with AWR front end links. Is this legal for stock class? If it's not, I'll look into going back to stock end links next season.

 

[apexlater]

Kosei K1-TS, 17x7, 50mm offset, 14.1 lbs, $200 each
Kazera KZ V, 17x7, 50mm offset, 17.2 lbs, $130 each
All found on TireRack.

Front endlinks are free. Get some adjustables (or make them) so you can get the pre-load out of the bar. Front swaybar bushings are free also, you can use poly.

You can un-bolt the exhaust from the end of the cat. I can't remember if there is a resonator before or after the cat, if after, that can go too.

 

[aMaff]

There's a resonator on the cat back right after the cat.

 

[livelyjay]

Kosei K1-TS, 17x7, 50mm offset, 14.1 lbs, $200 each
Kazera KZ V, 17x7, 50mm offset, 17.2 lbs, $130 each
All found on TireRack.

Front endlinks are free. Get some adjustables (or make them) so you can get the pre-load out of the bar. Front swaybar bushings are free also, you can use poly.

You can un-bolt the exhaust from the end of the cat. I can't remember if there is a resonator before or after the cat, if after, that can go too.

Thanks for the heads up. I already have adjustable front end links and I am glad to hear they are free.

 

[livelyjay]

I just read this piece in the rules:

APPENDIX B - BUMPING ORDER
Bumping is not approved for championship events. However, the
following bumping order is recommended for regional events in cases
where a class is to be combined with another class.
...
Example: If there is only one entrant in each of the three classes CS, DS and DSL,
the entrant in DSL would be bumped into DS first to form a DS class and
the CS entrant would then be bumped upward into BS (i.e., it would not
be correct to bump the DS entrant into CS before considering the DSL
entrant).

So does this mean my SCCA region is doing their classes wrong? Many times we have a single class that has one entrant (e.g. last event in ASP there was a single Lotus Exige entrant). I find this very interesting and intriguing and wonder if other regions actually follow this rule.

 

[aMaff]

Naa, bumping's not 'mandatory'. The MiddleGA region usually does it for single entrant classes.

 

[apexlater]

It is up to the Region to decide if "bumping" is desired. I haven't run a region that does this personally. Here in Atlanta we have several classes with 1-2 competitors.

It all depends on how each region creates their run/work groups, and this can help balance things out if they do not have another means.

Regions are also allowed to create classes if it wants to. Several have Stock-street tire classes, STX2, etc. They make their own pax for those classes, but are obviously not Nationally recognized.

So, no, your region isn't necessarily doing it wrong.

 

[aMaff]

ATL region has a 'club class' that is made up of (if I'm not mistaken) the paxed scores of all the single entry classes, and the winner of the club class gets a year end trophy. But like Wayne said, no bumping.

 

[livelyjay]

Since apexlater isn't following the other thread, I will ask this here:

13.7 ANTI-ROLL (SWAY) BARS
A. For front anti-roll (sway) bars:
4. No modification to the body, frame or other components to
accommodate anti-roll bar addition or substitution is allowed,
except for the drilling of holes for mounting bolts. Nonstandard
lateral members which connect between the brackets
for the bar are not permitted.

To me the part in bold makes it sound like the AWR front end links are illegal. The other part of me thinks that as far as the front sway bar goes, you can do whatever you want as long as you don't modify the stock frame and body work to fit a bigger sway bar and you can't change the stock mounting points. Thoughts?

 

[moxnix]

A Nonstandard lateral members which connect between the brackets
for the bar is something like this.

The white bar (Not what the arrow is pointing to) connects between the two bushing mounting brackets on the miata and is not legal.

End links have long been considered part of the bar. I also think you can change the mounting points of the bar if you want since if it had none you could choose your mounting points for the addition of the bar but I am not sure why you would.

 

[mazdaspeed777]

subbin

 

[livelyjay]

A Nonstandard lateral members which connect between the brackets
for the bar is something like this.
Image Removed to be Polite to Readers
The white bar (Not what the arrow is pointing to) connects between the two bushing mounting brackets on the miata and is not legal.

End links have long been considered part of the bar. I also think you can change the mounting points of the bar if you want since if it had none you could choose your mounting points for the addition of the bar but I am not sure why you would.

I see what you mean and I agree with you about the end links. You can change where the end links attach to the front bar as well.

Another question:

13.2 A: Accessories, gauges, indicators, lights and other appearance,
comfort and convenience modifications which have no effect on
performance and/or handling and do not materially reduce the
weight of the car are permitted

Is it just me, or is "materially" a subjective word?

 

[aMaff]

well, yes, but put it this way: add weight, don't take it away, on the interior, if you must.

 

[apexlater]

"Materially" means what it says. If you want to replace your speakers, make sure that the aftermarket pieces weigh the same as OEM or more.

 

[moxnix]

Actually (from answers.com)

materially (mə-tr'ē-ə-lē) pronunciation
adv.

1. With regard to the physical world.
2. With regard to matter as distinguished from form.
3. To a significant extent or degree; substantially

I would say #3 is what we are looking at. "To a significant extent or degree; substantially" I think it is very subjective however I think as long as you replace like with like and not try replacing your subwoofer with a tiny little computer speaker you should be ok.

 

[livelyjay]

Sounds good guys. So that is a Stock Class rule, there is nothing in Street Touring about that, so I guess it is safe to assume those same rules apply in Street Touring?

 

[moxnix]

14.1 AUTHORIZED MODIFICATIONS - STS
A. All Solo Rules Stock Category allowances, plus all allowances
contained in 14.1 through 14.10.

 

[livelyjay]

Gotcha, that's what I thought. So technically I should put my sub back in and then I would be legal for STX.

Man, I just keep finding things to ask questions on. There is a tire forbidden in Street Touring: Pirelli P Zero Corsa.

Is it safe to assume this tire is illegal to run in the Street Tire class? I could understand why as this tire is 140 treadwear, but looks to be considered a Competition Tire by TireRack and can be purchased shaved/heat-cycled. I run Azenis, so I don't care that much, but I'm just curious.

 

[aMaff]

The only 'street tire' classes are the STS/2/STX/STU where the tire is banned. Local street tire classes have their own rules generally. For example, we have a street tire challenge for cars in R-comp classes running street tires with 200 or higher tread wear. Ask the folks in your region. Plus, for the money that those cost, you may as well buy R-comps lol